On the use of dielectric elements in axion searches with microwave resonant cavities
On the use of dielectric elements in axion searches with microwave resonant cavities
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DOI：
10.1088/1748-0221/18/07/p07017
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发表时间：
2023-04
影响因子：
1.3
通讯作者：
Xiran Bai;M. Jewell;S. Lamoreaux;Reina H. Maruyama;K. Bibber
中科院分区：
文献类型：
--
作者：
Xiran Bai;M. Jewell;S. Lamoreaux;Reina H. Maruyama;K. Bibber
本研究探讨了介电材料在基于谐振腔的轴子暗物质搜索中的主要影响。虽然电介质在许多情况下被证明是有益的，但它们的加入可能会导致性能不佳，特别是对于最低的 TM 模式。此外，电介质内部电场的更强限制会加剧模式混合，特别是对于高阶模式。结合解析解和数值模拟进行了案例研究。研究结果表明，与在等效频率下不使用电介质的空腔中进行的类似搜索相比，采用 TM010 模式的电介质空腔的灵敏度显着降低。
This study explores the primary effects of dielectric materials in a resonant cavity-based search for axion dark matter. While dielectrics prove beneficial in numerous cases, their incorporation may lead to less-than-optimal performance, especially for the lowest TM mode. Additionally, the stronger confinement of the electric field inside the dielectrics can exacerbate mode mixings, in particular for higher-order modes. Case studies have been carried out using a combination of analytical solutions and numerical simulations. The findings indicate dielectric cavities employing the TM010 mode experience a significant reduction in sensitivity when compared to a similar search conducted in a cavity at equivalent frequency using no dielectrics.